Need some help also out of PHX: PHX-CVG or PHX-CMH or PHX-IND

• <=$400 r-t a.i.
• disprefer WN (Southwest) though they're direct on most of those
• depart Oct 24 (preferable) or 25
• return Oct 27 or 28 (preferable)
• not working so no time-of-day limitations

Posting for a friend though I know FlightFox is even more appropriate arena.